Abkürzungen "M"
| MAARC | Moncton Area Amateur Radio Club  |
| MAOTA | Mining Activity on the Air |
| MARAC | Marine Radio Amateur Club |
| MARC | Motorcycling Amateur Radio Club |
| MARCO | Medical Amateur Radio Council |
| MARL | Malta Amateur Radio League |
| MARS | Maldives Amateur Radio Society |
| MARS | Military Affiliated Radio System |
| MARTS | Malaysian Amateur Radio Transmitters Society |
| MDXC | Mediterraneo DX Club |
| MF | Marinefunker |
| MFCA | Marine Funker Club Austria |
| MIA | Mediterranean Sea Island Award |
| MRASZ | Hungarian Radioamateur Society |
| MRD | Maritime Radio Day |
